Remove the head and innards. Hold the tail in one hand and the head in the other. Pull the two apart with a slight twisting motion. Use a paper towel if needed to help add some grip while holding the squid. The innards will come out right along with the head.
Remove the ink sack and harvest the ink. This is where your trusty gloves will come in handy as squid ink stains. It may also be a good idea to don an apron and cover any porous surfaces. Now look for a small black vein within the innards. Remove the squid ink vein with a small sharp knife. Puncture the sack and drain the ink into a small bowl with a bit of water. There’s also some ink behind the eyes, so you can harvest those as well if you wish. Now you can discard the innards.
Cut off the tentacles from the head. Using a sharp knife and chopping board remove the tentacles. Place the knife just underneath the eyes of the squid and cut all the way through to detach the tentacles from the head. Discard the head.
Remove the beak and discard. Like the cartilage, the squid’s beak is inedible. It’s located at the base of the tentacles, where the tentacles meet the head. To remove it, squeeze the area around the beak and it should pop right out. Discard the beak and set the tentacles aside.
Remove the cartilage and discard. Place two fingers inside the tail (or body) and grip the cuttlebone. It should come out easily and in one piece. Discard it.
Remove the skin. (Optional). This step is optional as the skin is edible. Removing it is really for aesthetic purposes only. Cut a shallow slice into the skin to get started. The skin should easily peel away from the flesh.
All that should be left now are the tentacles and tail tube. Wash them both thoroughly, and set aside in a bowl.
If using large squid, cut into smaller pieces.